公开(公告)号：JPH02163488A

公开(公告)日：1990-06-22

申请号：JP31911788

申请日：1988-12-16

Applicant: MATSUSHITA REFRIGERATION

Inventor： YOSHIMURA TAKAO ,  MORITA ICHIRO ,  OGAWARA HIDEJI

IPC: F04C18/356

Abstract: PURPOSE:To secure lubricity between a vane and a cylinder groove as well as to make improvements in performance and reliability by installing an oil groove in at least one side of wall surfaces at the inlet chamber side and the compression space side of the cylinder groove, and interconnecting each lubricating oil in this oil groove and a closed casing part. CONSTITUTION:An oil groove 20a is set up on a wall surface at the side of an inlet chamber 11a of a groove 19a in a cylinder 19 and an other oil groove 20b on a wall surface at the side of a compression space 11, respectively, and a sub-bearing 21 supports a shaft 3, while it has an interconnecting groove 21a interconnecting lubricating oil 18 and these oil grooves 20a, 20b. Refrigerant gas is sucked into a chamber 11a via an inlet pipe 14 and an inlet passage 15, and after being compressed in a chamber 11b, discharged out via a discharge part 16, a closed casing 1 and a discharge pipe 17. Likewise, pressure in a back pressure chamber 13 is also fluctuated between intermediate pressure Pm and high pressure Pd. At this time, lubricating oil of this high pressure Pd in the casing 1 is led into the oil grooves 20a, 20b via the interconnecting groove 21a. Consequently, refrigerant gas in the chamber 3 is in no case penetrated into space between a vane 6 and the groove 19a, thus positive lubrication takes place.

公开(公告)号：JPH02146287A

公开(公告)日：1990-06-05

申请号：JP29871888

申请日：1988-11-25

Applicant: MATSUSHITA REFRIGERATION

Inventor： MORITA ICHIRO ,  YOSHIMURA TAKAO ,  SAKAI TOSHIKAZU ,  OGAWARA HIDEJI

IPC: F04C29/00

Abstract: PURPOSE:To reduce frictional loss between a shaft and a bearing by providing a bearing member having a recessed part with an area less than one eighth of the whole inner surface and with a fixed depth in a main and a sub bearings at the circumferential angel of less than 90 deg. from a vane in the reversely rotating direction of the shaft. CONSTITUTION:The recessed part 18a provided on the inner diameter side of a bearing member 18 fitted into a main bearing 7 is positioned within at least 90 deg. from the position of a vane 6 in the reversely rotating direction of a shaft 3, and its area is made less than one eighth of the whole inner surface area. With this structure, the shaft 3 is eccentric approximately in the range of 120 deg.theta1-180 deg.theta2 due to the load acted upon the shaft 3 at the time of operation, so that frictional loss generated by the friction between the fluid and lubricating oil supplied between the shaft 3 and the bearing member 18 is decreased by providing the recessed part 18a at the bearing member 18 on the reverse eccentricity side of the shaft 3. In addition fluid friction is scarcely generated by making the depth of the recessed part 18a 0.1-0.5mm, so that frictional loss can be reduced.

公开(公告)号：JPH0281985A

公开(公告)日：1990-03-22

申请号：JP23394588

申请日：1988-09-19

Applicant: MATSUSHITA REFRIGERATION

Inventor： OGAWARA HIDEJI ,  YOSHIMURA TAKAO ,  MORITA ICHIRO

IPC: F04C18/356 ,  F01C21/08

Abstract: PURPOSE:To attain high efficiency in the time of steady operation and preventing a mechanical element from being damaged in the time of starting operation by housing two sheets of vanes in the inside of a vane groove and providing a spring belonging to only either one the vanes. CONSTITUTION:Compressing action is performed in a cylinder chamber 11 in the time of starting, in case of sucking refrigerant liquid or oil 17 to cause liquid compression, a sudden rise of pressure occurs in the cylinder chamber 11. Here of the two sheets of vanes 9a, 9b, a spring 21 is adapted to only one sheet, so that when the first vane 9a is lifted, liquid in a high pressure chamber promptly leaks to a low pressure chamber side, and an abnormal rise of pressure in the cylinder chamber 11 is prevented. While in the time of steady operation, a gas pressure load, applied to rear ends of the first and second vanes 9a and 9b, sufficiently generates contact force of the vanes 9a, 9b with a roller 6 because a vane groove 8a and a rear end groove hole 8b are in the same pressure to the inside of a closed vessel 16, and efficient operation can be attained of high sealing quality with lass leakage by providing a contact point in two parts.

公开(公告)号：JPH0233483A

公开(公告)日：1990-02-02

申请号：JP18437688

申请日：1988-07-22

Applicant: MATSUSHITA REFRIGERATION

Inventor： YOSHIMURA TAKAO ,  MORITA ICHIRO ,  OGAWARA HIDEJI

IPC: F04C18/356

Abstract: PURPOSE:To improve efficiency by setting the eccentricity E of the crank of a shaft to rho1

公开(公告)号：JPH01318785A

公开(公告)日：1989-12-25

申请号：JP15076688

申请日：1988-06-17

Applicant: MATSUSHITA REFRIGERATION

Inventor： OGAWARA HIDEJI

IPC: F04C29/00

Abstract: PURPOSE:To prevent lubricant from leaking excessively by providing the inside of a cylinder with a roller piston the inner circumferential surface of which is in a recessed spherical shape, and thereby concurrently forming the inside of the roller piston with a shaft having an eccentric section in a projected spherical shape. CONSTITUTION:The inside of a cylinder 4 is provided with a roller piston 19 in the inner circumferential section of which is formed in to a recessed spherical shape. And a main shaft 20a and an auxiliary shaft 20b are included within the roller piston 19, and a shaft having an eccentric section 20c formed into a projected spherical shape which is slidably coupled with the roller piston 19, is concurrently arranged therein. This constitution can prevent the roller piston from being tilted even when the shaft 20 is tilted. This permits therefore an oil film to maintain the roller piston 19 is parallel with bearings 7 and 8 at all time, thereby making it possible to prevent lubricant including refrigerant from leaking excessively because of tilting the roller piston 19 so that both volmetric efficiency and compression efficiency can be improved.